Both Stack and Berkcan, 63, of Clifton Park were extricated from their vehicles and flown to Albany Medical Center with serious injuries.

State Police determined that Stack was intoxicated by alcohol and impaired by marijuana at the time of the crash.

Stack, who also pleaded guilty to misdemeanor DWI, was ordered to install an ignition interlock device for three years after he is released from prison. He must pay restitution to the victim as part of the plea agreement, Murphy said.

Berkcan suffered a dozen injuries including multiple facial fractures and fractures of the back, ribs and leg. He also had a ruptured spleen and retinal injuries, Murphy said.